39641228897 has 2 divisors, whose sum is σ = 39641228898. Its totient is φ = 39641228896.

The previous prime is 39641228833. The next prime is 39641228929. The reversal of 39641228897 is 79882214693.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23893739776 + 15747489121 = 154576^2 + 125489^2 .

It is a cyclic number.

It is not a de Polignac number, because 39641228897 - 2⁶ = 39641228833 is a prime.

It is not a weakly prime, because it can be changed into another prime (39641228597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19820614448 + 19820614449.

It is an arithmetic number, because the mean of its divisors is an integer number (19820614449).

Almost surely, 2^39641228897 is an apocalyptic number.

It is an amenable number.

39641228897 is a deficient number, since it is larger than the sum of its proper divisors (1).

39641228897 is an equidigital number, since it uses as much as digits as its factorization.

39641228897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10450944, while the sum is 59.

The spelling of 39641228897 in words is "thirty-nine billion, six hundred forty-one million, two hundred twenty-eight thousand, eight hundred ninety-seven".